I blocked and deleted his number but our chat still shows up in whatsapp. Our last conversation was so upsetting it is what finally got me to remove him from my life, 3 months ago and zero contact since then, although I'm still hurting.

I have felt the need to talk to him again a few times, but getting back to that chat and seeing what he wrote to me when I was at my very lowest, because of him, prevented me to falling back to talking to him.

It bothers me to still have that "piece" of him looming around, but at least it has been a useful reminder so far...

Should I definitely delete it?